hudson



72551 @mail the picture 'has been taken. ing introduced into the apparatus,'is placed on f UNITED .STATES PATENT OFFICE.

WM. HUDSON, JR., AND AUGUSTUS L. HDSON, 'OF HINGHAM, MASS.

P HoToGRAPHlC sENslTlzlnca-Box.l

Specification forming part of Letters Patent No. 51,1834, dated January 2, 1866.

To all 'whom it may concern: Y

Be it known that we, WILLIAM HUDSON, J r.,

and AUGUSTUS L.HUDsoN, of Hingham, in the county of Plymouth and State of-Massaf lchusetts,have invented a new and Improved Sensit,izing`-Box;`and we do hereby 'declare that the following 'isa full, clear, and exact description thereof, which willv enable others .skilled in theart to inake and use the same,

referencebein g-had to the accompanyin g draw- -ings, forming part of this specification, in whichtion ofthe same, taken Ain the plane indicated by the line z z, Fig. 2.' Fig. 4 is a front ele- .vation of the same, theshield having been removed'. Fig. 5 is-aside elevation of the same.

. Fig'. Gis an inside view of the shield detached. Fig. 7 vis a detach'edhorizontal section ofl the rock-shaft, which serves to impart motion.

Similur'lettersof reference indicate like parts. 4'

This invention relates to an apparatnsby Q Jwhich'the operation of sensitizing a plate of glass or otherv material cau be effected eutirely by mechanical means and withouthold in g the plate in the hands or touching it from the time it is introduced into the apparatus until it is removed from the plate-holder after The plate, ou bea pair of hooked arms or dippers, which extend from a' rock-shaft to. which an oscillating Y motion is imparted by a suitable hand-lever,

said vmotion being regulated by a series of `gear-wheels and cam-grooves in sucha man ner that when the dippers, with the plate, approach the cistern containing the nitrate of silver or other sensitizing solution, the cover of 'said cistern turns back automatically, and as soon as the dippers, with the plate, have reached the properwposition over the cistern their motion ceases and the cistern rises, and

thereby the plate is dipped into the solution, and can be kept'therein the desired length of time, and by lowering the cistern the plate can be left to drain. After the operation of sensitizing has thus been accomplished the handlev is turned back and the plate is carried forward and delivered into the shield. The shield is provided with spring-catches, which are set at the beginning ot' the opeation, and

. when the plate has entered the shield, by the handle coming in contact with an adjustable stop,` said springcatches are sprung and caused to hold the plate' securelyin place. By

closing the shield and removing it from the sensitizing-holtl the plate can be introduced into the camera andexposed to thelight withoutl ever touching it with the hands or lingers. The mechanism whereby the motion of the various parts is controlled will be presently described with reference to the drawings.

A. represents a box, made of' wood or any other suitable material, square, oblong, or in any desirable form or shape. The sides of this box form the bearings fora shaft, B, to which au oscillating motion is imparted by a suitable handle, G. j From the roch-shaft B rise two arms, D, which forni the bearings for the rocking head E, from which the dippers F extend. The arms D are firmly connected to the shaftB, whichV turns looselyr in its bearings, aud the handle C is mounted on theouter end of a sleeve or cap, a, which is fitted on the. gudgeou of the rock-shaft, as shown particularly in Fig. 7. The sleeve is rendered rigid with the shaft B at the proper intervals by means of two spriugdogs, b b', which are secured tothe opposite 'edges of one of the arms D, and which drop behind shoulders c c in the circumference of a disk, d, which is mountedon the inner end of the sleeve. It' the sleeve is turned in thedirection of the arrow marked on it in Fig. 1, thelshoulder c' bears against the spriug-dog b' and the shaft B is compelled to revolve in the saine direction until a piu, e', which projects from the dog b', comes in contact with a stationary abutment, f, and thereby the dog is raised to the position shown in Fig. 1, and the shaft is free to turn in the direction of the arrow independent ot the sleeve B. When the sleeve is turned iu the opposite direction of the arrow until the shaft is brought in the position shown in Fig. 3,11. pin projecting from the dog b, by coming iu contact with the abutment f,

throws said dog out of gear with the shoulder i "-shown in saidgure.

pers` F extend, turns on gndgeons g, which have their bea-rings in the outer ends of theA arms D. One-.of these gudgeons extends through its arms and formsacrank,-g', the end of which catches in a cam-groove, hh', in' thev side of .the box A, as seen particularly in Fig. 3. -A spring, i,=app1ied to the head E,

. has a tendencytov throw the end of the crank 1 Ig' up and -keep the saine in contact with the upper side ofthe cam-groove. By this arrangement the dippers F assume the required position automatically, and if the shaftB has arrivedin` the position shown in Fig. 1 the dippers remain. stationary, pointing in the direction of-theeistern G, whereas, when the shaft B has' arrived in the position shown in. Fig, 3, the dippers, after having deposited the platein 'the shield, drop back from the position shown in dotted lines to that shown in full-outlines.v Thisbackward-motiouisei'eeted by. the form of the .cam-groove h', which branches oli from the groove-11.and in moving back from the position shown in Fig. 3 to that shownin Fig. 1 the end of the crank g passes through the groove h' until itstrikes a dat spring-, j, which, being forced open, allows the same to pass from the groove h' into the groove h. On the forward motion, bowl ever, the end of the crankis prevented, bythe v racks l*,.secured to the sides of the cistern --guide-barsor frame G'. The shaft 7d has its hearings' in the Asides of thebox A, and derives its motion from a toothed segment, H,

which is mounted on .the sleeve a, as shown particularly'in- Fig. 1. .This segment is provided with two sets of teeth,` l and l', one set,

l, on its .circumference and one set, l', on itsY inner side. Y

' 'If the sleeve L or thelhan'dle C is turned I inthe direction of the arrow marked thereon in Fig. 1, thevcistern remains stationary until the shaft B has `arrived in this position At this point the dog b' is thrown out of gear with the shoulder c', and the teethlon the'circumferenoe of the segment H commence to engage with the teeth of one of the... pinions 7c, causing the shaft k' to revolve,` and imparting to the cistern G a rising motionby means of the racks l, at-

tached Lto the cistern-frame G. By turning the handle-.0in the direction opposite the arrowmarked on it in Fig.-1 the cistern is again lowered and the teeth l disengage from the vpinion k,- and it the shaft B has arrived in the position shownA in Fig. 3 the dogb is thrown ont of gear with the shoulder c, and the sleeve continues to turn independent of the shaft,

aud'then .the teeth l in the side of the segment H begin to engage with the teeth of a segment, I, which has its bearings lon a stud, m, secured in the side of the box, and which gears inra pinion, J, mounted on a shaft, n. This shaft'has its bearings in the sides of the box A, and it bears a spring-pad, K, which foreesthe' plate from thedippers into the shield, and holds the same after the dippers F have been retracted and until the spring-catches of the shield are sprung, as shown iu Fig. 3.

Y The cistern Gr is intended to conta-in the nitrate of silver or other sensitizing solution; and in order to protect this solution against impurities which might drop into it,-t-he cistern is provided withva cover, L. Before the cistern'begins to rise the cover is opened antomatically by the followinglnechanism The cover is' hung on gudgeons o, one of which bears a pinion, p, (see Fig. 1,) which gears in a toothed rack, g, attached to an oscillating lever, M. This lever has its fnlcrum on a pivot, r, in a lug or bracket secured to the bottom ot' the box, and it is provided with a latch, s, which is hinged to it,`as shown in Fig. 1. The lower edge of this latch forms a cam, which rests on a pin, t, secured in the side of on fief the guide-bars G', and it is provided w i i a lip, u, notch o, and rounded nose w. )hen the arms D swing toward the back of t-he box, a pin, a?, projecting from one of them, by com.- ing in contact with the lip u, pushes the latch s and the lever M back and v'causes the cover L to open. This takes place before the dippers have assumed the position shown in Fig.A l and before the cistern begins lto rise. After the plate has been dipped the shaft B is turned in the direction opposite the arrow marked thereon in Fig. 1, and the pin a1, by coming in contact wit-h the inner edge of the nose lie, closes the cover, and at the same time the latch moves forward, so thatits lower edge, by sliding on the pin t, raises the same high enough to disen gage the nose "w from the pin a", and the forward motion of the arms D is not interrupted.

N is the shield,wh ich is constructed, inthe ordinary manner, of wood or-any other suitable material. c'z d2, between which the plate is received, and the plate is'held in position by spring-catches b2. These catches consist of wires having both ends bent at right angles, as shown in Fig. 6, and they are secured to t-hcshield by means of loops or staples c. Pinions ff, mounted on the wires d, gear into toothed racks g2, which are guided in suitable grooves in the shield, and from which extend Shanks h2, snrmounted by buttons'. the racks up, and have a tendency to keep the catches bz closed down upon the plate. B5

pressing on the buttons iz the piuions]Lpz are turned and the catches are opened. The shield is placed between guide-bars O on the front side of the box, and said guide-bars are provided with cavities k2, to receive the buttons i. After the shieldhas been adjusted in the. Y proper position both buttons can be forced 1n- It is provided with two slides,

Springs j2 force nects, by e linli, n, with n lever, o,

. pivoted to the side of the box, ns shown in ward simultaneously by the .action of two levels, Linz?, which are -hinged to the outer edges of the guide-bar ssO. The lever l? conwhich is Fig,.5, and the end of the lever m? projects V through a. loop at the loose end ot clever, p2, ,which is also pivoted to the side of the box,

and connects with the lever oz by a. rod, q2.

` B y `this amangement n pressure exerted on the lever o acts simultaneously on both buttons i, :und both springcotches b2 are, opened simultaneously. Therad q is provided with a, notch, 1*,sud the levers L2 mz lare depressed. A vspring-dog, si, catches in seid notch und holds'snid levers down and the catches b open. The spring-dog s2k is furnished with a set-screw, t2, and if the handle Gis brought forward it s I'rikes ogninst the point of seid set-screw, and byrelensingth'cdogscunsesthespringeutches bl to close.

The-handle C isfurnished with lever-catch u, and. il scid handle has been movedfnr enough round to misc `the cistern to its full height the lever-catch drops into a notched bracket, of, and the appnmtns is retained in position usicng ns muy be required to sensiy tize-the plate.

The operation isos follows After the shield :has been adjusted .in its place the slide c is druwnhout and the levers L* m2 are depressed,

Iso nsto open the spring-catches D. The

handl'cCis turned until the cronlr g' of the .head E stands opposite the opening h* in the Vcam-groove.

(See Fig. 3, where said cinngroovc and opening-nre shown.) Then the dippers nre rinsed, so that their points rest upon brackets w3, secured to theinner surface reffi-he front side of the box A. In this position the dippers ure held, and the prepa-red or collodionized plete is gently adjusted thereon` v so that the sinne is situated in the center and opposite the cavityin the shield which is intended 'to receive the plate. When this has been accomplished the dippers, together with the plete, are gently lowered, and the handle is turned in the direction of the arrow marked on the sleeve cl in Fig. l until the lever-catch f n? drops into the notch of e". By this mofton the dippers, with the plo-te, are brought over the cisten, sind the eistern is raised, so that the plete is submerged in the solution contained in suid cistern. Aftero sufficient lopse of time the handle is turned forward, so as to lower the cistern, und the plete is left to drain, the dri ppn gs being collected in the cistermnnd then the forward motion of the handle is continued until, by the action ofthe spring-pad K, the plate is pushed oi from the -dippcrs sind held in "the cavity of the shield,

and finally, by the action of the handle against thesetfscrew t2, the spring-catches bz in the shield are sprung, the bundle is turned back,

, t-h'e slide ci is pushed iu, and the operation ot sensitiziugthe plete' is accomplished.

In order to keep the lplatte properly in the "flle on the clippers, suitable guide-strips may be -uttsuiiied to the edge-s of the openings in the front side of the box, and said edges ere made tapering for the purpose of guiding the plate to the cavity in the shield if the same should hcve been displaced by the operation of dipping.

In order to simplify the construction, the toothed rack l* may be secured to the cistern itself, thus dispensing with the frame G.

- We claim ns new and desire `tosecure by Letters Potent- 1. The within-described method of sensitizing c plate,.hy placing the same on dippers, immersing it in the sensitzing solution, and securing it in the shield, all these operations being effected by mechanism substantially such as herein specified, or any equivalent thereof.

2. Thedippers F, applied to a rocking head, E, in combination with the intermittently-oscillnting sleeve B, cam-groove It', and shield N, all'constructed ond operating substantially as and for the purpose described.

3. 'The oscillating lever M nud latch s, in combination with oscillating arms D, toothed ruck q, pinion p, ond hinged cover L, constructed and operating substantially as und for the purpose set forth.

4.. Providing the cistern with n self-operating cover, substanti all y as on d for the purpose specified.

5. Raising the cistcrn containing,r the sensitzing liquid against the plate to be sensitized, nstend ofldipping the ploteiuto the liquid by means substantially such as herein described, or any equivalent means.

6. The spring-pad K, applied in combina.- tion with the dippers F and shield N, substantially as and for the purpose described.

7. The spring-catches b2 in the shield, in combination with buttons constructed und operating substantially as and for the purpose described.

S. The levers l2 m2 o'L p2 and connecting-rod q, applied in combination with the springcatches b2 in the shield, substantially :is und for the purpose set fort-h.

9. The spring-dog s, in combination with the notch r2 in the rod g2, und with levers o p2 L2 m2 and spring-catches bl in the shield, all

constructed and operating substantially as `and for the purpose described.

10. The set-screw ta in the springdog s2, applied in combination with the handle C, as described, so that the moment when the spring'- catches b2 nrc sprung con be regulated.

lhe above specification of our invention signed by us this 16th dey of June, 1865.

WILLIAM HUDSON, JR. AUGUSTUS L. HUDSON.

Witnesses for Wm. Hudson, J r.:

M. M. LivINosToN, W. HAUFF.

Witnesses for A. L. Hudson z LEONARD GAIN, PETER HUMrnnEYs. 

